[patch] drm/i915/gvt: i915_gem_object_create() returns error pointers

[Dan Carpenter]

The i915_gem_object_create() returns error pointers on error, it never
returns NULLs.

Fixes: ("drm/i915/gvt: vGPU command scanner")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
The error handling in perform_bb_shadow() is a bit leaky as well.

diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c 
b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index 5808ee7c1935..6abb2a679a3f 100644
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -1640,8 +1640,8 @@ static int perform_bb_shadow(struct parser_exec_state *s)

        entry_obj->obj = i915_gem_object_create(&(s->vgpu->gvt->dev_priv->drm),
                round_up(bb_size, PAGE_SIZE));
-       if (entry_obj->obj == NULL)
-               return -ENOMEM;
+       if (IS_ERR(entry_obj->obj))
+               return PTR_ERR(entry_obj->obj);
        entry_obj->len = bb_size;
        INIT_LIST_HEAD(&entry_obj->list);

@@ -2712,8 +2712,8 @@ static int shadow_indirect_ctx(struct intel_shadow_wa_ctx 
*wa_ctx)

        wa_ctx->indirect_ctx.obj = i915_gem_object_create(dev,
                        round_up(ctx_size + CACHELINE_BYTES, PAGE_SIZE));
-       if (wa_ctx->indirect_ctx.obj == NULL)
-               return -ENOMEM;
+       if (IS_ERR(wa_ctx->indirect_ctx.obj))
+               return PTR_ERR(wa_ctx->indirect_ctx.obj);

        ret = i915_gem_object_get_pages(wa_ctx->indirect_ctx.obj);
        if (ret)